The Oracle tkprof utility is a tool for analyzing SQL trace files, converting them into a readable format to identify where time is spent during query execution. It provides details about various stages of SQL operations, including parsing, executing, and fetching data, along with metrics like CPU time, elapsed time, and I/O statistics. To activate SQL trace, the trace file is located under the udump directory with a specific naming convention.

1. ORACLE
TKPROF
UTILITY

2. TKPROF Stands for Transient Kernel
Profiler
It allows you to analyze a trace file to determine where
time is being spent
It converts SQL trace files into human readable format.
To activate SQL trace for a particular session:

4. Trace File Location
The name of the trace file is <Oracle_SID>_ora_<p.spid>.trc under
UDUMP location:

5. Run TKPROF

6. READING TKPROF
REPORT
PARSE: Oracle finds query in shared pool or creates a new plan
EXECUTE: Does the work of query. It is empty for SELECT statement.
FETCH: Pulls the data back, empty for update, bulk of work for select

7. Count: How many times each activity has been
performed
CPU: CPU time used by the query
ELAPSED: Wall clock time spent
DISK: Physical I/Os to disk
Query: Blocks read from rollback / undo
Current: Blocks as they exists now
Rows: Number of rows affected

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